Stack lifting device

ABSTRACT

A mobile incinerator having a detachable exhaust stack that is raised and lowered between a vertically disposed operating position and a horizontally disposed inoperative position by a suitable jacking arrangement. The stack is supported on trunnions at its center of gravity whereby it is pivotally balanced so that when carried entirely by the trunnions, little effort is needed to rotate the stack about its pivot point to obtain perfect alignment between the stack and the incinerator whereby an attachment thereto may be readily effected.

United States Patent 11 1 Fanton [4 June 4, 1974 STACK LIFTING DEVICE Primary Examiner-Kenneth W. Sprague l ,N. [75] Inventor Ralph E Fanton Wellsv1le Y y, g Flrm Wayne H. g [73] Assignee: The Air Preheater Company, Inc., Wellsville, NY. [22] Filed: May 25, 1973 [57] ABSTRACT [2]] App! 357979 A mobile incinerator having a detachable exhaust stack that is raised and lowered between a vertically [52] US. Cl 110/18 R, llO/l9, 110/184 disposed operating position and a horizontally dis- [5]] Int. Cl. F23g 5/00 posed inoperative position by a suitable jacking ar- [58] Field of Search 1 10/8 A, 18 R, 19, I84 rangement. The stack is supported on trunnions at its I center of gravity whereby it is pivotally balanced so [56} References Cited that when carried entirely by the trunnions, little ef- UNITED STATES PATENTS fort is needed to rotate the stack about its pivot point 73' 079 6/1903 Seiner 110/184 to obtain perfect alignment between the stack and the l774005 8/1930 Hensel 110/19 incinerator whereby an attachment thereto may be 2,305,181 12/1942 McCray ll0/I84 1 readlly t FOREIGN PATENTS OR APPLICATIONS 6 Claims, 4 Drawing Figures 362,203 l2/l93l Great Britain ll0/l84 STACK LIFTING DEVICE This invention relates to a mobile incinerator having an elongate, detachable exhaust stack that is raised vertically into an operative position and attached to the incinerator or lowered horizontally adjacent thereto into an inoperative position to facilitate mobility between installations.

The current development of incinerators for the re duction of waste material, trash and garbage has, on occasion, required that the incinerators be made capable of being moved from one location to another in order that they may be used with the greatest effectiveness wherever substantial concentrations of waste are to be found.

To permit more satisfactory mobility of an incinerator, the structure thereof has been made stronger, the insulation therein has been made more resistant to shock, and the entire incinerator assembly has been mounted on suitable wheels to permit its mobility. In many cases the incinerator and its controls already have been designed to accept a large variety of waste materials, so the only additional structural modification necessary to permit the incinerator to be moved from one location to another under power lines, underpasses and the like and then incinerate various forms of waste is to insure that the exhaust stack be constructed so that it can be dismantled to thereby permit the incinerator to clear obstructions that are commonly encountered during such periods of transportation.

Such a modification to the incinerator stack is readily effected, but it is costly both in manpower and time required since it frequently requires the deliberate dismantling of the stack at one site before moving and then completely rebuilding it at another location after the move has been completed.

SUMMARY OF THE INVENTION This invention therefore provides for an incinerator having a detachable exhaust stack with a hydraulic lifting and centering arrangement whereby a lone individ- BRIEF DESCRIPTION OF THE DRAWING FIG. I is a side elevation of the mobile incinerator including the stack lifting arrangement in a withdrawn position,

FIG. 2 is an end elevation of the incinerator having a stack lifting arrangement in a partially extended position as seen from line 2 2,

FIG. 3 is a side elevation of an incinerator with the stack lifting arrangement in a partially assembled position,and

FIG. 4 is a side elevation of an incinerator having a stack in a fully extended and operating position.

DESCRIPTION OF THE PREFERRED EMBODIMENT The apparatus, according to this invention, comprises a wheeled trailer having a flat bed 12 on which is mounted a standard multichambered incinerator comprising a primary chamber 14 including an inlet 16 for the waste material to be burned and an opening 18 for the outlet of exhaust gases'therefrom. The outlet opening 18 is secured to an afterburner chamber 22 that includes a burner connected to a source of fuel 26 and to a source of air 28 which conveniently is connected to the same source that supplies controlled amounts of air to the duct for the partial combustio or pyrolysis of waste material in chamber 14.

The afterburner 22 is connected by a pair of abutting flanges 34A and 343 to an elongate stack 32 in which the gases supplied to afterburner are completely burned before the residues therefrom are exhausted to the atmosphere. Stack length for a particular incinerator is determined by factors necessary to obtain a residence time of from 0.5 to 0.8 seconds for exhaust gas moving at approximately 80 ft./sec. whereby combustion of gases within the stack will be complete. Thus a suitable stack for a typical mobile incinerator may extend from 10 ft. to 30 ft. above the afterbumer, a height that precludes freedom of movement past many of the obstacles that commonly exist on our public highways.

Accordingly, I provide each stack 32 with a flange 34B whereby it might be tightly secured by bolts or other clamping means to flange 34A on to afterburner 22 and thus erect it in an upright position, or by loosening the clamping means joining the flanges 34A and 34B, the stack may be completely dismantled and removed from the incinerator;

At the approximate center of gravity of each stack I secure a pair of trunnions 36 to diametrically opposite sides of the stack 32 whereby the stack 32 will assume a near balanced position when raised by forces applied to the diametrically located trunnions 36.

Under each trunnion 36, I position a telescopic hydraulic jack 37 that is supported laterally adjacent the stack and is actuated by a conventional control mechanis'm (not shown) which is supplied by a source of mechanieal force or hydraulic pressure. The two jacks, at opposite sides of the stack are operated by a single control mechanism in order that both jacks may be simultaneously raised or lowered a similar amount.

The upper end of each jack is formed to include a bearing 46 which is rotatably secured to the trunnion 36 at opposite sides of the stack whereby the stack, when lifted byapplying an upward force to thetrunnions, may berotated about the trunnions by the application of only a slight force at either end of the stack.

To facilitate rotating the upright stack about a pivot point determined by the trunnions 36, I provide the stack with booking pads 52 whereby an operator may insert a rod or book 56 therein and apply a force necessary to rotate the balanced stack 32 on trunnions 36 about its rotatable supports.

Adjacent the front end of the trailer bed I position a cradle 58 that holds the end of the stack 32 after it has been lowered and rotated to a horizontal position.

When being transported from one location to another, the stack may be thus retracted with one end lying in the cradle 58 and the hydraulic jack lowered to position the trunnions laterally offset therefrom whereby the intermediate stack will lie substantially horizontal as shown in FIG. 1.

When in a location where normal operation is to be effected, the controls 50 for the hydraulic jacks may be actuated and the jacks carrying the trunnions 36 raised. Inasmuch as the stack is balanced it may accordingly be raised in a horizontal position. An operator may readily insert a rod in the hooking pad 52 and rotate the stack into a vertical position. A release of hydraulic pressure being supplied to the jacks will then permit them to retract whereby the stack will be lowered until it rests on the outlet flange 24A from the incinerator. An opposite sequence of operation will permit the stack to be initially raised off the flange 24A and then lowered to a fully horizontal position for maximum ease of mobility.

While only one form of my invention has been shown, it is obvious that various changes may be made without departing from the spirit of my invention. It is therefore intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not in a limiting way.

I claim:

1. A mobile waste incinerator adapted for movement from one location to another comprising a housing with an inlet and outlet enclosing a primary chamber for the pyrolyzation of waste therein, a movable door closing the inlet opening, an afterbumer having an inlet opening for gas from the primary chamber and an outlet opening for the exhaust of the products of combustion therefrom, means connecting the inlet of the afterburner to the outlet of the primary chamber, an elongate stack, means releasably connecting the elongate stack to the afterburner, trunnion means extending normal to the stack at the approximate center of gravity of said stack, and lifting means engaging said trunnion to apply a vertical force thereto whereby said stack may be lifted from the afterbumer and rotated in the trunnion about its center of gravity.

2. A mobile waste incinerator as defined in claim 1 wherein the lifting means comprises a hydraulic actuating means.

3. A mobile waste incinerator as defined in claim 1 wherein the trunnion means comprises a cylindrical pivot that extends laterally from diametrically opposite sides of said stack.

4. A mobile waste incinerator as defined in claim 3 having independent lifting means positioned subjacent portions of the trunnion that extend outward from opposite sides of said stack.

5. A mobile waste incinerator as defined in claim 4 wherein the independent lifting means are operated by a single controller.

6. A mobile waste incinerator as defined in claim 1 including a cradle means adapted to support an end of said stack when it is lowered to a horizontal position. 

1. A mobile waste incinerator adapted for movement from one location to another comprising a housing with an inlet and outlet enclosing a primary chamber for the pyrolyzation of waste therein, a movable door closing the inlet opening, an afterburner having an inlet opening for gas from the primary chamber and an outlet opening for the exhaust of the products of combustion therefrom, means connecting the inlet of the afterburner to the outlet of the primary chamber, an elongate stack, means releasably connecting the elongate stack to the afterburner, trunnion means extending normal to the stack at the approximate center of gravity of said stack, and lifting means engaging said trunnion to apply a vertical force thereto whereby said stack may be lifted from the afterburner and rotated in the trunnion about its center of gravity.
 2. A mobile waste incinerator as defined in claim 1 wherein the lifting means comprises a hydraulic actuating means.
 3. A mobile waste incinerator as defined in claim 1 wherein the trunnion means comprises a cylindrical pivot that extends laterally from diametrically opposite sides of said stack.
 4. A mobile waste incinerator as defined in claim 3 having independent lifting means positioned subjacent portions of the trunnion that extend outward from opposite sides of said stack.
 5. A mobile waste incinerator as defined in claim 4 wherein the independent lifting means are operated by a single controller.
 6. A mobile waste incinerator as defined in claim 1 including a cradle means adapted to support an end of said stack when it is lowered to a horizontal position. 